Merge pull request #190 from CarlosManias/master

Add snap files for RemoteSystemsTempFiles linux
Dropbox sample and related code changes
Dropbox config changes (sbt.properties)
Dropbox related change
Fix the issue with credential store primary key.
DB Credential store fix
Dropbox : Removing earlier change in LibraryServlet (was not required)
Merge pull request #194 from ManishKataria/CredStoreFix

DB Credential store fix
Dropbox managed bean
Merge pull request #193 from ManishKataria/DropboxSampleAndChanges

Dropbox sample and changes